Replace BMW Key Battery If your BMW key isn't opening the doors of your car or turning on the engine, it might be time to change your battery. Fortunately, it's an easy fix. Simply remove the key fob, then replace the battery and gently put it back. Follow these steps https://thekeylab44911.newsbloger.com/30708758/bmw-key-fobs-tips-from-the-top-in-the-industry